RJ03-Reflective Journal Entry 3- Assessment - Due Saturday, March 13, 2011
Identify a GSE and create a learning performance that combines evidence of understanding a critical concept with writing a good scientific explanation for a topic in your next unit. Provide a link in your description to the appropriate GSE.
Create a specific rubric for this scientific explanation.
Describe a difficulty or misconception that this activity might surface.
Describe you might use this assignment to provideformativefeedback to your students.
Write a scientific explanation that states what kinds of compounds, and specifically what products, are formed from the reaction of C7H17 and O2.
PS1 (Ext) -4
Students will be given specific reactants and will have to write a scientific explanation which claims what products are formed and what types of compounds they are (ionic or molecular). Evidence must prove that these are the appropriate products formed by balancing the chemical equation. Lastly, reasoning a combustion reaction always produces carbon dioxide and water.
C7H17 + O2 --> ???
A difficulty students will have with this scientific explanation will be in balancing the chemical equation.
I will use this as formative feedback during the unit as an in-class assignment. After students have learned about the 5 types of chemical reactions, I will have the students individually write this scientific explanation. I will grade it out of 6 points and provide written feedback that is helpful and useful for the students to understand why something was incorrect or why they didn't get the full amount of points.
Component
Level 0
Level 1
Level 2
Claim
Does not make a claim, or makes an inaccurate claim.
States incorrect products and/or identifies the compounds incorrectly.
Makes an accurate but incomplete claim.
Vague statement, like "the products formed are both compounds."
Makes an accurate and complete claim.
Explicitly states that CO2 and H20 are the products formed and that both are molecular compounds.
Evidence
Does not provide evidence, or only provides inappropriate evidence.
Provides inappropriate data, like C7H17 and O2 are the reactants or provides vague evidence like "the products contain carbon, hydrogen, and oxygen."
Provides appropriate, but insufficient evidence to support the claim. May include some inappropriate evidence.
Provides some evidence that is fitting of the data like, "carbon, hydrogen, and oxygen must be in the products because of conservation of mass."
Provides appropriate and sufficient evidence to support claim.
Provides all correct pieces of evidence, like only carbon, hydrogen, and oxygen are present in the reactants and so those are the only elements that can be present in the products, and the equation is balanced to further prove that the reaction produces CO2 and H2O. They also state that the two products are molecular because they are composed of two or more nonmetals.
Reasoning
Does not provide reasoning, or only provides reasoning that does not link evidence to the claim.
Provides an inappropriate reasoning statement like "this is like the experiment the teacher showed us in class."
Repeats evidence and links it to the claim. May include some scientific principles, but not sufficient.
Repeats evidence or provides incomplete generalization about ...
Provides accurate and complete reasoning that links evidence to the claim. Includes appropriate and sufficient scientific principles.
Includes detailed facts about combustion reactions and that they are generally described as a reaction of oxygen and a compound of C, H, (O) which forms carbon dioxide and water as products.
Reasons that the two products are both molecular compounds because they are both composed on nonmetals and molecular compounds are composed only of nonmetals.
RJ03-Reflective Journal Entry 3- Assessment - Due Saturday, March 13, 2011
Write a scientific explanation that states what kinds of compounds, and specifically what products, are formed from the reaction of C7H17 and O2.
PS1 (Ext) -4
Students will be given specific reactants and will have to write a scientific explanation which claims what products are formed and what types of compounds they are (ionic or molecular). Evidence must prove that these are the appropriate products formed by balancing the chemical equation. Lastly, reasoning a combustion reaction always produces carbon dioxide and water.
C7H17 + O2 --> ???
A difficulty students will have with this scientific explanation will be in balancing the chemical equation.
I will use this as formative feedback during the unit as an in-class assignment. After students have learned about the 5 types of chemical reactions, I will have the students individually write this scientific explanation. I will grade it out of 6 points and provide written feedback that is helpful and useful for the students to understand why something was incorrect or why they didn't get the full amount of points.
States incorrect products and/or identifies the compounds incorrectly.
Vague statement, like "the products formed are both compounds."
Explicitly states that CO2 and H20 are the products formed and that both are molecular compounds.
Provides inappropriate data, like C7H17 and O2 are the reactants or provides vague evidence like "the products contain carbon, hydrogen, and oxygen."
Provides some evidence that is fitting of the data like, "carbon, hydrogen, and oxygen must be in the products because of conservation of mass."
Provides all correct pieces of evidence, like only carbon, hydrogen, and oxygen are present in the reactants and so those are the only elements that can be present in the products, and the equation is balanced to further prove that the reaction produces CO2 and H2O. They also state that the two products are molecular because they are composed of two or more nonmetals.
Provides an inappropriate reasoning statement like "this is like the experiment the teacher showed us in class."
Repeats evidence or provides incomplete generalization about ...
Includes detailed facts about combustion reactions and that they are generally described as a reaction of oxygen and a compound of C, H, (O) which forms carbon dioxide and water as products.
Reasons that the two products are both molecular compounds because they are both composed on nonmetals and molecular compounds are composed only of nonmetals.